This marvellous non-fiction book, aimed at soon-to-be siblings, charts the month-by-month development of an unborn baby in the womb. Children will learn that in the first month, their sibling is the same size as a grain of sand, while by month three, they have grown to the size of an egg and developed fingers and toes. By the ninth and final month, Baby is the size of a watermelon and ready to be born. Introducing correct terminology, such as pregnancy and foetus, the book presents age-appropriate information which will prompt discussions with parents. It effectively explores a range of emotions, from the excitement and impatience of waiting for the new arrival, to potential anxieties, such as having to share their home, family and toys. By putting the child at the centre of the adventure as a new big brother or sister, it encourages them to play an active role in the baby's life prior to its birth. Warm, cheerful illustrations depict different genders, ethnicities and family set-ups, giving it broad appeal. This informative and reassuring picture book would make the perfect gift for any child preparing to welcome a new baby into the family.